------- Additional Comments From cvs-commit at gcc dot gnu dot org 2005-02-01
20:30 -------
Subject: Bug 19633
CVSROOT: /cvs/gcc
Module name: gcc
Changes by: [EMAIL PROTECTED] 2005-02-01 20:30:08
Modified files:
gcc : ChangeLog tree-flow.h tree-ssa-alias.c
gcc/testsuite : ChangeLog
gcc/testsuite/gcc.dg: pr19633.c
Added files:
gcc/testsuite/gcc.dg: pr19633-1.c
Log message:
PR tree-optimization/19633
* tree-flow.h (struct ptr_info_def): Add field 'pt_null'.
* tree-ssa-alias.c (init_alias_info): Initialize.
(merge_pointed_to_info): Set.
(add_pointed_to_expr): Set pt_null if EXPR is a NULL pointer.
(dump_points_to_info_for): Show value of pt_null.
(struct count_ptr_d): Declare.
(find_ptr_dereference): Remove.
(ptr_is_dereferenced_by): Remove.
(count_ptr_derefs): New local function.
(count_uses_and_derefs): New local function.
(compute_points_to_and_addr_escape): Call it. If the number
of dereferences is greater than zero, mark the pointer as
dereferenced. If there are fewer dereferences than uses of
the pointer, the pointer's value escapes.
testsuite/ChangeLog
PR tree-optimization/19633
* testsuite/gcc.dg/pr19633-1.c: New test.
* testsuite/gcc.dg/pr19633.c: Tweak to make pointer point
to NULL or a symbol.
Patches:
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/ChangeLog.diff?cvsroot=gcc&r1=2.7365&r2=2.7366
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-flow.h.diff?cvsroot=gcc&r1=2.78&r2=2.79
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/tree-ssa-alias.c.diff?cvsroot=gcc&r1=2.67&r2=2.68
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/ChangeLog.diff?cvsroot=gcc&r1=1.4973&r2=1.4974
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/pr19633-1.c.diff?cvsroot=gcc&r1=NONE&r2=1.1
http://gcc.gnu.org/cgi-bin/cvsweb.cgi/gcc/gcc/testsuite/gcc.dg/pr19633.c.diff?cvsroot=gcc&r1=1.1&r2=1.2
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=19633
